Question

In how many ways can a lawn tennis mixed double be made up from seven married couples if no husband and wife play in the same set?

Answer 1

Thank you for asking this question. Here is your answer:

We can choose two females in around (7/2) ways

And the males who are not their spouses in (5/2) ways,

And the 4 can be paired in just 2 different ways.

So finally we will get

(7/2) x (5/2) x 2

= 420

So the final answer is 420 if there is any confusion please leave a comment below.